Metal reinforce for concrete and blank therefor.



PATENTED JULY 9, 1907.

No. 859.313. 1). MAXWELL.

METAL RBINFORUB FOR CONCRETE AND BLANK THBREF INVENTOR APPLICATION FILED MAY 21. 1906.

DAVID MAXWELL, OF DETROIT, MICHIGAN.

METAL REINFORCE FOR CONCRETE AND BLANK TEREFOR.

Specification of Letters Patent.

Patented July 9, 1907.

Application filed May 21, 1906. Serial ITO- 317,871.

To all whom 'it may concern:

Be it known that I, DAVID-MAXWELL, of Detroit, Wayne county, Michigan, have invented a new and useful Metal Reinforce for Concrete and Blank Therefor, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which Figure 1 is a side elevation of a reinforce made in accordance with my invention, Fig. 2 is a side view of one end portion of the blank showing the cuts therein, the manner in which the parts are bent being shown by dotted lines; Fig. 3 is an end view oi-the blank; and Figs. 4 and 5 are similar views showing modified forms of blanks.

The obj ect of my invention is to provide a reinforce which can be cut and bent from a rolled bar or shape, its intermediate portion having an increased cross-sec tion, and the surplus metal utilized for reinforcement above the neutral axis near the center; also toprovide a novel form 015 rolled blank from which the reinforce can be made by simple cutting and bending operations. In the accompanying drawings, the numerals 2, 3, 4 and 5 designate a series of parallel bars which are connected at their central portions by integral webs (j, the end portions of the bars 3, 4 and 5 being bent upwardly. in opposite directions to form the oblique brace members 7, and the upper end portions of the brace members of the bars 4 and 5 being bent horizontally in opposite directions to form the reinforcing members 8, above the neutral axis of the reinforce.

In making the reinforce shown in Fig. l, I first roll a blank or shape of the-form and cross-section indicated in Fig. '3, consisting of the parallel bar members 2, 3, 4 and 5 united by the connecting webs 6 in the central plane of the bars. I then cut away or shear the web's 6 in the manner shown in Fig. 2, and bend the end portions of the bars at such cut-away portions to form the braces 7 and upper reinforcing members 8.

The bars may be cl: any suitable shape in cross-section, such as the fiat oblong shown in Fig. 3, the square or rhomboid shown in Fig. 4, or the approximate circle sho n in Fig. 5, or any other desired shape. Any desired number of the bars may be used according to the length of the reinforce.

It will be noted that the construction above described provides for an increase in the cross-section of the reinforce at its central portion, 'and that the sur-' plus material, beyond what is necessary to form the brace members, is utilized to form reinforcing members above the neutral axis of the reinforce at its central portion.

Various modificationsmay be made without departing from the spirit and scope of my invention, sinc What I claim is.

1. A metal reinforce for concrete structures consisting of a lower member or chord composed of a plurality of parallel bars in substantially the same vertical plane and connected by integral webs at their intermediate portions, their end portions being separated and Debt to form braces, and some of said braces being bent backwardly towards the center of the reinforce; substantially as described.

2. A metal reinforce for concrete structures consisting of a lower member or chord composed of a plurality of parallel bars in substantially the same vertical plane and connected by integral webs at their intermediate portions, their end portions being separated and bent to form braces, and some of said braces being bent backwardly towards the center of the reinforce above the neutral axis of the reinforce; substantially as described.

3. A metal reinforce for concrete structures consisting of a lower member or chord composed of a plurality of parallel bars in substantially the same vertical plane and connected by integral webs at their intermediate portions,

their end portions being separated and bent to form braces, and some of said braces being bent backwardly towards the center of the reinforce, the backwurdlybentportions beingof dllferentlengths; substantially as described.

4. A metal reinforce consisting of a lower member or chord composed of a plurality of superimposed bars integrally united at their central portions and separated at their end portions, the separated portions of some of the bars being bent horlzontallyto form an upper chord above T the central portion of described. 5. A metal reinforce composed of at least three superimposed bars integrally united at-thelr central portions and separated at their end portions, the separated end portions being formed into an upper'chord extending over the lower chord; substantially as the central portlon of the lower chord; substantially as described.

6. A metal reinforce having a lower chord composed of at least three members integrally connected at their central portions and separated at their end portions, one of said members having its end portions bent to form sepa- .rated members bf an upper chord, and a second member .bent to complete the said chord; substantially as described. 4

'7. A' metal reinforce having a lower chord composed of a plurality of members integrally connected at their cen-- tral portions and separated at their end portions, said end portions being bent to form oblique braces extendlngln opposite directions at opposite sides of the center of the chord, and some of said braces belng'bent backwardly towards the center of the reinforce to constitute an upper chord; substantially as described.

8. A metal reinforce composed of a lower member or chord having a plurality of parallel cuts or slits in its end portions, ,the cut or slit portions being. bent upwardlyv and then backwardly toward the center of the -reinforce to form an upper chord; substantially as described." In testimony whereof, I have hereunto set my hand.

Witnesses:

Huron!) Mclu'rumn, Wanna 8. WHEELER.-

-DAVID MAXWELU: 

